Click on a day for an hourly weather forecast
The temperatures in Grafton in May are quite cold with temperatures between 9°C and 20°C, warm clothes are a must.
You can expect rain for roughly half of the month of May in Grafton. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Grafton in May 2025.
If you’re planning to visit Grafton in the near future, we highly recommend that you review the 14 day weather forecast for Grafton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -6° | 5 | 16 | 10 | 118 mm | Awful | Grafton in January |
| February | 2° / -6° | 6 | 13 | 10 | 131 mm | Awful | Grafton in February |
| March | 7° / -2° | 7 | 17 | 7 | 139 mm | Awful | Grafton in March |
| April | 14° / 4° | 8 | 21 | 1 | 130 mm | Ok | Grafton in April |
| May | 20° / 9° | 8 | 23 | 0 | 111 mm | Ok | Grafton in May |
| June | 24° / 13° | 8 | 22 | 0 | 129 mm | Good | Grafton in June |
| July | 28° / 17° | 8 | 23 | 0 | 141 mm | Good | Grafton in July |
| August | 28° / 16° | 6 | 25 | 0 | 117 mm | Perfect | Grafton in August |
| September | 24° / 13° | 5 | 25 | 0 | 84 mm | Perfect | Grafton in September |
| October | 17° / 8° | 7 | 24 | 0 | 139 mm | Ok | Grafton in October |
| November | 10° / 2° | 6 | 23 | 1 | 108 mm | Ok | Grafton in November |
| December | 4° / -2° | 7 | 18 | 6 | 139 mm | Awful | Grafton in December |